Hi Avinash,
try to collect deeper level traces about the used SOAP receiver channel in mapping lookup.
You will need to check what was the request message and how the response message look like - including the HTTP headers.
Hopefully you will see there more details why this operation fails.
Maybe the error message is thrown by something between the target server and PI interrupts this connection, like proxy, web dispatcher, ICM, ...
Best Regards,
Viktor
